_Prepositions_ are especially defined in Grammar as words denoting _relations_. Our attention is thus turned in the Domain of Language to the _Parts_ of Speech; and to the Syntax (putting together), or Construction of these Parts into the wholeness of Discourse. This is more specifically the Department of Grammar. Conjointly these are what may be denominated the Relationismus of Language. This is the Domain immediately above the Elementismus. In the same way the division of the human body or any other object into Parts, Limbs, Members, etc., and the recombination of these into a structural whole, arises in the scale of creation above the Domain of Elements (Ultimate, Proximate, Chemical, etc.), this last embracing only the _qualitative_ nature of the _substances_ entering into the structure. In the Universe at large, therefore, this Relational Domain is that in which we shall find Things, Properties, Actions, and, specifically, the Relations between such, and their Combinations into Structures and Departments, Branches, or Limbs of Being, and finally into the total Universe itself, which is the analogue of the totality of Language. Relation has a threefold aspect: first, in respect to Space; second, in respect to Time; and third, in respect to _Instance_ or Present Being, the conjunction of the _Here_ and the _Now_. The first of these aspects subdivides into what Kant denominates, 1. SUBSTANCE, and 2. INHERENCE. The second of these aspects subdivides into what Kant denominates, 1. CAUSE, and 2. DEPENDENCE. The third of these aspects of Relation Kant sums up in the term RECIPROCAL ACTION. Commencing with the first of these three subdivisions of Relation, and making our application within the Domain of Language, it is obvious that it refers to the Substantive and Adjective region of Grammar; Substance relating to Substantives, and Inherence (or Attributes) to Adjectives; or otherwise stated, thus: SUBSTANTIVES = THINGS (= Substance.--_Kant_). ADJECTIVES = PROPERTIES (= Inherence.--_Kant_). The one Thing inclusive of all minor Things is the Universe. The Universe as Thing, or the concrete domain of Being, subdivides into the world of Things proper as distinguished from the Personal world, or the Human world or Man. This first division of the _substantive_ Universe corresponds with the first grand grammatical division of Nouns Substantive into 1. Common Nouns Substantive, and 2. Proper Nouns Substantive. Common Nouns Substantive correspond with Things proper, not aspiring to the rank of Personality; Things put in contrast with Persons; Things in that sense in which we speak of a person derogatorily as _a mere thing_; hence, _common_ or _ordinary_, and as a common, undistinguished herd of objects, only named and discriminated by the class-name of the class of objects to which they belong.